You can do it in BIOS. with software, im sure there is, but if you must overclock. I highly recommend overclocking a CPU with software that is by your Motherboards company. I.E. don't use software on an ASUS board that was made by Chaintech.

there is also SoftFSB, CPUFSB, and more but they all have bugs.GO into your bios and find a setting where you up the CPU fsb, then put it up and if your computer doesnt start clear the cmos and try to go lower.